diff --git a/test/cmake_add_subdirectory/CMakeLists.txt b/test/cmake_add_subdirectory/CMakeLists.txt
index ad04547e..4fa9eb88 100644
--- a/test/cmake_add_subdirectory/CMakeLists.txt
+++ b/test/cmake_add_subdirectory/CMakeLists.txt
@@ -1,6 +1,7 @@
 add_test(NAME cmake_add_subdirectory_configure
   COMMAND ${CMAKE_COMMAND}
     -G "${CMAKE_GENERATOR}"
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
     -Dnlohmann_json_source=${PROJECT_SOURCE_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}/project
 )
diff --git a/test/cmake_import/CMakeLists.txt b/test/cmake_import/CMakeLists.txt
index 24d4a33a..af3c891c 100644
--- a/test/cmake_import/CMakeLists.txt
+++ b/test/cmake_import/CMakeLists.txt
@@ -2,6 +2,7 @@ add_test(NAME cmake_import_configure
   COMMAND ${CMAKE_COMMAND}
     -G "${CMAKE_GENERATOR}"
     -A "${CMAKE_GENERATOR_PLATFORM}"
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
     -Dnlohmann_json_DIR=${PROJECT_BINARY_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}/project
 )
diff --git a/test/cmake_import_minver/CMakeLists.txt b/test/cmake_import_minver/CMakeLists.txt
index 2efcd85f..d1a10721 100644
--- a/test/cmake_import_minver/CMakeLists.txt
+++ b/test/cmake_import_minver/CMakeLists.txt
@@ -2,6 +2,7 @@ add_test(NAME cmake_import_minver_configure
   COMMAND ${CMAKE_COMMAND}
     -G "${CMAKE_GENERATOR}"
     -A "${CMAKE_GENERATOR_PLATFORM}"
+    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
     -Dnlohmann_json_DIR=${PROJECT_BINARY_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}/project
 )